Article
How to Read Guitar Chord Diagrams
Learn how to read guitar chord diagrams quickly. Understand dots, numbers, Xs, Os, and finger positions so you can play any chord chart at sight.
Cmaj(add9)/D guitar shapes
Popular fretboard positions with fingering suggestions
Showing 8 of 80 playable shapes
About the chord
C major add 9 / D (3rd inversion)
The C major add 9 major add 9 chord extends the major triad with an added ninth D, creating a bright, expansive harmony. Unlike the major 9 chord, it lacks the major seventh, offering a fresher, more open sound often used in pop, rock, and jazz for uplifting atmospheres. With D in the bass, this voicing functions as the 3rd inversion of C major add 9.
Root note: C
Bass note: D
Chord tones: 4
Playable shapes: 80
Chord tones
CEGD
Notes & Intervals
Each note below shows how the chord is built from its root. This is the theory layer underneath the fretboard shapes.
C Unison (Root) 1
The root anchors the chord and defines its tonal center.
E Major Third 3
This note defines the chord's major quality and brings brightness to the sound.
G Perfect Fifth 5
The fifth reinforces stability and gives the chord its strong harmonic frame.
D Major Ninth 9
The ninth opens the chord up and adds a modern, spacious color.
Related Articles
Articles that reference this chord and explain how to use it in your playing.
Article
How to Build Chords from Scratch: Guitar Chord Construction Guide
Learn chord construction step-by-step: intervals, triads, sevenths, and extensions. Build any chord from theory to fretboard.
Article
Chord Inversions on Guitar: Voicings That Sound Professional
Learn chord inversions on guitar to create smoother transitions, richer voicings, and more professional-sounding arrangements. Includes shapes and exercises.
Article
Major vs Minor Chords: Hear and Play the Difference
Understand the difference between major and minor chords on guitar. Learn the theory, hear the contrast, and practice switching between happy and sad sounds.